A turn-based strategy video game with a fantasy setting where the player attempts to build a powerful army by controlling villages and defeating enemies for experience.
An open-source real-time strategy and real-time tactics hybrid computer game. It was originally released in 1999 for Microsoft Windows and PlayStation, and is now also available for macOS, FreeBSD, AmigaOS 4, AROS, MorphOS, Linux, NetBSD and OpenBSD.
A single and multiplayer turn-based strategy game inspired by the proprietary Sid Meier's Civilization series.
An open-source HTML5 game framework that offers WebGL and Canvas.
A 2D and 3D, cross-platform, free and open-source game engine released under the MIT license.
An open-source, cross-platform game engine designed for everyone - it's extensible, fast and easy to learn.
A free, open source cross-platform flight simulator developed by the FlightGear project since 1997.
An open-source re-implementation of RollerCoaster Tycoon 2 (RCT2), expanding the game with new features, fixing bugs and raising game limits.